title: Mortality in rheumatoid arthritis patients treated with or without methotrexate.
mesh_terms: D000206:Actuarial Analysis; D000328:Adult; D018501:Antirheumatic Agents / Q000627:therapeutic use*; D001172:Arthritis, Rheumatoid / Q000188:drug therapy* / Q000401:mortality*; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D007352:Insurance, Life; D008297:Male; D008727:Methotrexate / Q000627:therapeutic use*; D008875:Middle Aged; D014481:United States / Q000453:epidemiology
chemical_list: D018501:Antirheumatic Agents; D008727:Methotrexate